printf is a C function, and std::string is a C class. That's why you're getting the error.
To fix this, you can use the c_str() method of std::string to get a C-style string that you can pass to printf. For example:
#include <iostream>
#include <string>
#include <stdio.h>
int main()
{
using namespace std;
string myString = "Press ENTER to quit program!";
cout << "Come up and C++ me some time." << endl;
printf("Follow this command: %s", myString.c_str());
cin.get();
return 0;
}This will output:
Come up and C++ me some time. Follow this command: Press ENTER to quit program!
If you don't want to use c_str(), you can also use the string stream class to format your output. For example:
#include <iostream>
#include <string>
#include <sstream>
int main()
{
using namespace std;
string myString = "Press ENTER to quit program!";
cout << "Come up and C++ me some time." << endl;
ostringstream oss;
oss << "Follow this command: " << myString;
printf("%s", oss.str().c_str());
cin.get();
return 0;
}This will output the same as the previous example.
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